Measuring roll resistance
When wheels or casters roll along a surface, a force acts against this movement. This is known as the rolling resistance. It is the force that must be applied to keep the equipment rolling along steadily. The start-up resistance, on the other hand, is the force needed to set stationary equipment in motion. Another type of resistance is the swivel resistance. This influences the maneuverability of the equipment.
The roll resistance of each individual caster is determined in ideal test conditions. The floor must be level and free of obstacles and dirt, the temperatures must be within a specified range. The casters are tested at a speed of 4 km/h with an applied load equivalent to about two-thirds of the maximum load capacity. These ideal conditions make it possible to compare different wheels and casters. It must be taken into account that the actual ambient conditions during use usually deviate from the ideal test conditions, which means the roll resistance will change accordingly.
Measurement of rolling resistance
The roll resistance of each individual caster is determined under ideal test conditions. The floor must be flat and free of obstacles, debris and dirt, the temperature must be within a specified range. The casters are then tested at a speed of 4 km/h with an applied load equivalent to about two-thirds of the maximum load capacity. These ideal conditions make it possible to compare the various wheels and casters with each other. It must be taken into account, that the actual ambient conditions during use normally deviate from the ideal conditions, which means that the roll resistance will change accordingly.